The attacks were carried out through ransomware that withheld files and subsequently required users to pay a ransom in online currency bitcoin to retrieve their lost data. Current estimates peg the full breadth of the attack to at least 150 countries, The Wall Street Journalreports.

Experts warn that the full extent of the attacks are still unknown. European Union police reported Monday that 200,000 machines in Europe were hit by the attacks. Chinese state-run media reported that around 40,000 public and private agencies fell victim to Friday’s cybersecurity breach. Other nations are still trying to come up with estimates.

Some firms are being proactive, promising to increase cybersecurity measures. Companies have already pledged to increase cybersecurity measures 10 percent in Great Britain and Europe by 2020, Reutersreports.

Morgan Stanley estimates that a 10 percent increase in cybersecurity can save the global economy some $17 billion annually.

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